Cigar Lighter Cartridge Fuse Ferrule 6.35x32mm Time Delay Time Lag
Slow Blow Glass Tube Fuse 10Amp 250VAC 6x30mm
The Aolittel MTC Slo-Blo
w fuse solves a broad range of application requirements while
offering reliable performance and costeffective circuit protection.
Guesswork and time consuming circuit testing are eliminated. This
unique design offers the same quality performance characteristics
as the standard MTCSlo-Blow
• In accordance with UL Standard 248-14
• Available in cartridge and axial lead format and with various
• RoHS compliant and Lead-free
Used as supplementary protection in appliance or utilization
equipment to provide individual protection for
components or internal circuits.
10000A@125 V AC (100mA~10A);
35A@250V AC (100mA~1A);
100A@250V AC (1.25A~3.5A);
200A@250V AC (4A~10A).
Electrical Characteristics by Series
% of Ampere Rating(In)
|100%* In||4 hours Min|
|135%* In||1 hour Max|
|200%* In||120 sec Max|
Cap: Nickel–plated brass
Leads: Tin–plated Copper
|Terminal Strength||MIL-STD-202, Method 211, Test Condition A|
|Solderability||MIL-STD-202 method 208|
Cap1: Brand logo, current and voltage ratings
Cap2: Series and agency approval marks
|Operating Temperature||–55ºC to +125ºC|
|Thermal Shock||MIL-STD-202, Method 107, Test Condition B: (5 cycles -65°C to
|Vibration||MIL-STD-202, Method 201|
|Humidity||MIL-STD-202, Method 103, Test Condition A: High RH (95%) and
Elevated temperature (40°C) for 240 hours|
|Salt Spray||MIL- STD-202, Method 101, Test Condition B|
Difference Between Ceramic & Glass Fuses
A fuse protects electrical appliances and equipment by breaking the
electrical circuit in the event of an overload of current or a
short circuit. There are a number of different types of fuses
available, and these differ in size, shape and material. Ceramic
and glass are two common materials used to make fuses.
How Fuses Work
When a fault occurs, such as an overload or short circuit, the high
current that is flowing through the fuse melts the fuse element,
thus interrupting the flow of current and breaking the circuit.
This prevents the appliance from damage due to excess current.
The earliest fuses were no more than simple open wires introduced
in an electrical circuit to break the flow of current when
necessary. The first enclosed fuse was created by Edison in 1890.
Since then, the fuse has developed and diversified into many
Though the purpose of all fuses, whether ceramic or glass, is the
same, each has a unique manner of functioning and a unique response
to an overload of current. The fuses available are very fast acting
fuses (FF), fast-acting or quick-blow fuses (F), medium-acting or
semi-delay fuses (M), slow-blow, time-lag or time-delay fuses (T)
and very-slow-acting, long-time-lag or super-time-lag fuses (TT).
Each fuse responds differently to current flow and surges, and
takes a different amount of time to react; it is therefore
important to choose the correct fuse for the circuit it is to be
introduced in. An incorrect fuse could either mean no protection
because it has not melted in time, or oversensitivity when it blows
repeatedly for no real reason. For example, if an FF fuse is fitted
in a circuit with an appliance that creates a current surge when it
is first switched on, the fuse would blow even though there is no
threat. Typically, for a 500 percent overload, an FF fuse would
take one-tenth the time of a normal F fuse to blow, while a T fuse
would take up to 200 times longer.
A fuse body is made of glass, ceramic, plastic or fiberglass. The
body is called the barrel, and it has a terminal made of plated
copper or brass at each end. These terminals are connected by the
fuse element, which is made of copper, aluminium, zinc, or silver.
The element could either be a single wire, or consist of more than
one wire. The multiple wires could be arranged in different ways to
make the fuse behave differently. Sometimes, sand or quartz powder
is filled in the body to alter the behavior of the fuse. This is
usually the case in a ceramic fuse.
In a glass fuse, the element is visible, and this makes inspection
easy, while a ceramic fuse is opaque. A glass fuse has a low
breaking or rupturing capacity. What this means is that the fuse
element melts when there is a high current or voltage. It is
therefore not suitable for appliances and equipments that draw a
lot of current. Ceramic fuses, on the other hand, have a high
breaking or rupturing capacity and are suitable for high current
and voltage circuits. Some ceramic HRC (high rupturing capacity)
fuses can safely interrupt upto 300,000 amperes of current, while
normal glass fuses have a much lower capacity, sometimes as low as
only 15 amperes.
Glass fuses have a low thermal stability and shatter in high-heat
conditions. Ceramic fuses, on the other hand, can withstand high
temperatures and are more thermally stable. Ceramic fuses, unlike
glass fuses, are also often filled with a filler like sand to
prevent the formation of a conductive film. When there is a short
circuit, the fuse element melts and vaporizes. It deposits on the
inside of the barrel or body as a film. In a glass fuse, the body
continues to get heated and the film begins to conduct electricity,
thus rendering the fuse inefficient. The sand in a ceramic fuse,
however, absorbs the heat energy and prevents the fuse from heating
and therefore conducting.
It is important to consider these factors before installing a fuse:
the maximum continuous current rating, which indicates the maximum
current that can pass through a fuse; the rupturing or breaking
capacity, which indicates the maximum current that can be
interrupted without causing damage; the voltage rating--the fuse
must be used at less than the rated voltage.
Ensure you choose the right fuse for your appliances and equipment
to protect them and to reduce the risk of overheating and fire. If
you are unsure, speak to an electrician.